Water tube boiler



Jan. 9, 1951 L. J. PETERS WATER TUBE BOILER 3 Sheets-Sheet 1 Filed April 10, 1946 I II,

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Jan. 9, 1951 L. J. PETERS WATER TUB`E BOILER 3 SheetS-Sheet 2 Filed April 10, 1946 N %NM s ZI-76146146' U %a em' .Zlli

Jan. 9, 1951 L. J. PETERS WATER TUBE BOILER 3 Sheets-Sheet .3

Filed April 10, 1946 Jonia %fli-eps By %m Mr a other na'r the top alternately near oppsite sides thereof or in different vertical planes and to provide for eicient water circulation through all of the combustion chamber sections. As shown, the ccmbustion chamber sections are disposed with the tops thereof substantially in the same plane as the top of the fire box, but the walls of the fire box extend below the bottoms of the combustion chamber sections. In this embodiment, the combustion chamber sections 15 are inclined rearwardly similarly to the inclination of the rear edges !4 of the side walls of the fire box. This arrangement provides for use of a maximum number` of combustion chamber sections without unduly restricting the passage of products of combustion to the stack 2 i.

In order to facilitate cleaning of soot from the combustion chamber sections 15, they are preferably disposed in slightly spaced relation. In order to efiect this spacing of the sections [5, each is provided at its lower portion with vertically spaced lugs 23 Contacting the next adjacent section. Alignment of the sections is facilitated by providing each with small recesses or indentations 24 for reception of the free ends of the spacing lugs 23 as shown more clearly in Figures 4 and 5. This also prevents relative vertical or lateral displacement of the combustion chamber sections while spacing them. In order to facilitate cleaning of the combustion chamber sections, asregards accumulation of sedin'ent therein, each is provided with a clean out opening at the bottom of each side member !6 and ll, closed by a plug 25.

The boiler further includes a steam receiver comprising a plurality of superposed hollow plate sections 26 connected to inter-communicate with each other as at 21 and thereby slightly spaced apart. The lowermost steam receiving section 26 is shown as relatively short so as to merely overlie the fire box, and this section is connected at 28 to the tops of the fire box Walls to communicate with v the latter and receive steam therefrom. The remaining sections 26 extend the full length of the fire box and the combustion chamber sections, the lowermost one of these longer sections being connected to at least rearmost ones of the combustion chamber sections as at 23 to communicate with the tops of the latter and to receive steam therefrom. The uppermost section 26 has a steam outlet pipe 30, and the sections 26 are provided with openings similar to the construction of steam radiator sections to facilitate the circulation of products of combustion therethrough and thereby insure.

production of high steam pressure.

Means which is yieldable longitudinally of the boiler is provided to tie the fire box and the combustion chamber sections together so as to compensate for expansion and contraction thereof. This means preferably consists of horizontal tie rods 3! extended longtudinally of the boiler at opposite sides of the fire box and the combustion chamber sections and passing through cross bars 32 extended across the front wall of the fire box above and below the door 8 and across the upper and lower portions of the rearmost combustion chamber section I 5, compression springs 33 being provided on corresponding projecting ends of the rods 3l between the adjacent cross bars 32 and nuts 34 adjustably threaded on said projecting ends of rods 3! outwardly of the bars 32. By adjusting the nuts 34, the compression of the springs 33 may be regulated sc that the fire box and the combus- 4 tion chainbr sections will be maintained in proper assembled relation at all times.

The fire box and the combustion chamber sections are suitably encased, such as by a metallic shell 35 having a refractory lining 36, the door 8 being carried by the shell 35 and located within an opening of the latter aligned with the fuel opening 1.

In operation, the hot products of combustion from the fire box heat the water in the fire box walls and the water tubes thereof, generating steam which passes to the steam receiver. These hot products of combustion also flow rearwardly through the combustion chamber sections, circulating about the frame members and water tubes thereof so as to generate additional steam that is supplied to the steam receiver. As the water is heated in the fire box walls and in the combustion chamber sections, effective circulation of the water takes place as indicated by arrows, facilitating the steam generating operation. Maximum heating of the water is obtained before the products of combustion pass to the stack 2l, and the steam is additionally heated in the sections of the steam receiver to insure production of high pressure steam, the products of combustion being allowed to pass upwardly from between the combustion chamber sections for circulation about the steam receiver sections.

As shown in Figure 9, the Capacity of the side walls of the fire box' and of the combustion chamber sections may be increased by providing a greater number of water tubes. In other words, in the constructions thus far described, the water tubes !3 and 20 are arranged in a single row, whereas the water tubes zaa of Figure 9 are arranged in two rows with the tubes of one row staggered with respect to those of the other row. This arrangement provides for an increased number of water tubes without increasing the thic kness of the section or wall.

Of course, the usual facilities will have to be provided for cleaning or blowing soot from the water tubes as is generally well known in the art.

From the foregoing description, it is believed that the construction, operation and advantages of the present invention will be readily understood and appreciated by those skilled in the art. Other modications and minor changes in details of construction are contemplated such as fall within the scope of the invention as claimed.

What I claim is:

In a water tube boiler, a water filled front fire box wall embodying a hollow rectangular plate having a fuel feed opening therethrough, water filled. side walls each comprising a rigid rectangular frame composed of hollow front, rear, top and bottom members, and spaced straight water tubes connecting said top-and bottom members within the frame, the rear members of said side walls having rearwardly inclined rear edges, a plurality of spaced water filled transverse combustion chamber sections disposed at a rearward inclination behind the side fire box walls and each comprising a rigid rectangular frame compcsed of hollow side top and bottom members, and spaced straight water tubes connecting said top and bottom members within the frame, nip- LOUIS J. PETERS.

REFERENCES CITED The following referenoes are of record in the file of this patent:

UNITED STATES PATENTS Number Name i Date 1,312,801 Morrow Aug. 12, 1919 1,633,674 Murray June 28, 1927 1,764,981 Rehfuss June 17, 1930 1,874,236 Bruce Aug. 30, 1932 1,947,225 Pflager et al Feb. 13, 1934 2,067,315 Dietrich Jan. 12, 1937 

